I know exactly what you're talking about
. For me its the taste of things. It's not that I have no appetite, its more that I have no appetite for some of the things I used to love to eat. Personally, I think its more a phobia, like maybe I'm afraid or just cautious because of what it might do to my stoma or my output. But then again, there are still plenty of things I loved before and I still do.
Kind of think the whole surgery thing, recovery, new life changes, "the bag", has screwed with my head a bit. All of it is a huge thing that has happened to us even though for me, it seems like things are going good.
I really believe that eventually everything will be just fine. Those Mocha Frapps from Micky D's do sound tasty.